How to format Excel cell as currency using axlsx gem - Ruby on Rails

Question

I learnt that you could format the types of cells in an Excel like this:

:types => [nil, :integer, :string]

However I looked at the list of all types possible and I find only integer and float but I don't see a currency option.

How can I format a cell as a currency so that the $ prefix and thousand separators are included automatically?

Please help!

Answer 1

You can define custom styles as you need them.

# an example of applying specific styles to specific cells
require "rubygems" # if that is your preferred way to manage gems!
require "axlsx"

p = Axlsx::Package.new
ws = p.workbook.add_worksheet

# define your styles    
currency = ws.styles.add_style(format_code: "$#,##0;[Red]$-#,##0",
                              border: Axlsx::STYLE_THIN_BORDER).
ws.add_row ["Q1", 4000, 40], style: [currency]

Additional styling documentation

Answer 2

Below style will add 2 decimal places to currency eg: $4200.32

currency = ws.styles.add_style(format_code: "$#,##0.00;[Red]$-#,##0.00",
                              border: Axlsx::STYLE_THIN_BORDER)

Answer 3

I know this is an old thread, but in case anyone stumbles across it like I did, this solution should also work, with the caxlsx gem ( https://rubygems.org/gems/caxlsx ):

# I discovered the 'num_fmt' usage in this source_code file: 
# https://github.com/caxlsx/caxlsx/blob/946f287a37c7a5d2b4fe2ae8d109848e257241b1/lib/axlsx/stylesheet/num_fmt.rb
xlsx_package = Axlsx::Package.new
wb = xlsx_package.workbook
currency_style = wb.styles.add_style({num_fmt: 8})

The 'format_code' option wb.styles.add_style(format_code: "$#,##0.00;[Red]$-#,##0.00") didn't work for my use-case. My spreadsheet reader (LibreOffice) would only recognize that option as a 'custom' formatted cell, not a 'currency' cell.

edit: They did use it in one of their examples. https://github.com/caxlsx/caxlsx/blob/946f287a37c7a5d2b4fe2ae8d109848e257241b1/examples/number_format_example.md